This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A112138 #2 Mar 31 2012 14:02:21 %S A112138 2675,1344,420,576,204,1320,756,1080,445,815,924,3120,481,1895,84,205, %T A112138 635,1140,265,180,1271,564,780,961,204,95,1140,516,229,456,924,660, %U A112138 911,265,659,180,925,480,611,360,745,1140,864,155,456,205,1115,169 %N A112138 First differences of A112068. %Y A112138 Half of the first differences of A112078. Cf. A112086. %K A112138 nonn %O A112138 1,1 %A A112138 _Antti Karttunen_, Aug 28 2005